Clock mechanism



S. A. PAVKY CLOCK MECHANISM Filed Aug. 1, 1924 4 Sheets-Sheet 1 him-M 5.A. PAVKY CLOCK MECHANISM Filed Aug. 1, 1924 4 Sheets-Sheet 2 S. A. PAVKYCLOCK MECHANISI Filed Aug. 1, 1924 4 Sheets-Sheet 5 INVENTOR- Oct. 13,5. A. PAVKY CLOCK MECHANISM 4 Sheets-Sheet 4 Filed Aug. 1, 1924 INVENTORPatented Oct. 13, 1925. 3

UNITED STATES PATENT OFFICE.

CLOCK MECHANISM.

Application filed August 1, 1924. Serial No. 729,474.

1 '0 all whom it may concern:

Be it known that I, STEPHEN A. PAVKY, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented new and useful Improvements in a ClockMechanism, of which the following is a specification.

My invention relates to new and useful improvements in a clockmechanism, and has for its primary object the simplification of such amechanism where used in actuating a striker and chimes as well as beingself adjusting in order that the parts will be synchronized at a certaintime so that the pro er chimes will be played and the proper stri *es bemade at their regular times.

Another object of the invention is to provide cooperating snails forcontrolling the chimes and striker in combination with mechanism ofunique desi n for determining the number of chimes to played and thenumber of strikes to be made. A further object of the invention is toprovide a new and im roved controlling device for starting an stoppingthe sound producing devices.

A still further object of this invention is to provide an arcuate rackand its component parts in combination with a pair of snails andassociated elements for controlling the chime and striker mechanism.

With these ends in view, this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains, may understand how to make and use the same, I will describeits construction in detail, referring by numerals to the accompanyingdrawings forming a part of this application, in which Fig. 1, is a planview of a clock mechanism constructed in accordance with myimprovements, portions thereof being broken away to clearly illustratethe construction and the sound producing devices being shown in theirrelative positions to the several hammers.

Fig. 2, is a front elevation of the same with the clock hands removed.

Fig. 3, is a rear elevation thereof.

Fig. 4, is a fragmentary detail elevation of the segmental gear and itscomponent and cooperating parts illustrated in the positions assumed bythe parts during the time the striker is operating.

Fig. 5, is a similar view with the parts illustrated in the positionsassumed just prior to the playing the quarter hour chimes.

Fig. 6, is a side elevation of the clock mechanism with portions brokenaway to illustrate the relation of the different parts.

Fig. 7, is a diagrammatic view of certain of the mechanical elementscontrolling the chimes and striker looking at the back faces thereoffrom the front plate of the clock mechanism and showing the parts in thepositions assumed during the first step of their operation prior to theplaying of the half hour chimes.

Fig. 8, is a similar view showing the parts during the chiming andstriking operations at twelve oclock.

Fig. 9, is a detail side elevation of the striker fin mechanism and therelative mechanism for putting it in and out of operative condition.

Fig. 10, is a detail plan view thereof.

Fig. 11, is a detail rear view of the same in diagrammatic form.

Fig. 12, is a detail plan view of the mechanism for actuating thesliding segment of the segmental gear.

Fig. 13, is an end view of the same.

Fig. 14, is a diagrammatic front elevation thereof.

Fig. 15, is a side edge view of the bell crank lever.

Fig. 16, is a top edge view thereof.

In carrying out my invention as herein embodied, 2 represents thesupporting frame of the clock mechanism including front and rear plates3 and 4 respectively, fastened tocarried b gether in any suitable wellknown manner and this frame carries the sprin arbors 5 and 6, the arbor5 being connecte with the sprin (not shown) which actuates the sounproducing devices and the arbor 6 being connected with the spring (notshown) which operates the time gears.

The train of gears which actuate the sound producing devices consists ofthe drive gear 7 receiving its power from a suitable spring of ordinaryconstruction connected to the arbor 5 and this gear 7.- meshes. with apinion 8 mounted on the shaft 9. On the same shaft and revolvin with thepinion 8 is a gear 10 meshing with the pinion 11 mounted on a shaft 12on which is also mounted the escapement wheel 13 and a gear 14, thelatter meshing with a pinion 15 on the shaft 16. Said shaft 16 carries agear 17 which meshes with a pinion 18 on the shaft 19 which carries agear 20 meshing with a pinion 21 formed on the fan shaft 22, said shaftcarrying the controlling fan 23.

On the rear end of the shaft 16 is a inion 24 adapted to mesh with thesegmenta gear 25 havmgperipheral teeth around the major portion 0 itscircumferences, but having a blank s ce 26, Fig. 14, at one int and withthis lank space coo rates t e sliding segment 27 having a, su cientnumber of teeth 28 to completethe. gear. The sliding segment is rovidedwith an aperture or opening 29 or registration with the shaft 30 onwhich the segmental ear is mounted and further provided with s ots 31through which pass suitable fastening devices such as screws 32, saidfastening devices being the web or body portion of the segmenta gear.The lower end of the segment 27 is provided with an outwardly projectingtang 33 which, when the segment is raised, will rest upon theupper endof the rest, lever 34 pivoted as at 35 to, the rear plate of'the frameand theweighted, end 36 of this rest lever is sufiiciently heavy tonormally maintain said rest lever in an upright or vertical positionwhile the op site end or portion which coacts with the s iding segmenthas a bevel nose 37. Adjacent the upper end said sliding ment is rovidedwith a pin 38, adapted to can age at predetermined intervals by the iftlever 39 having an arcuate foot 40 for contact with said pin 38 and saidlift lever is secured to the rear end of a shaft 41 which passes throughthe frame and projectsbeyond the outer faces of each of'the plates 3 and4 while on the o posite or front end of said shaft 41 is fixe the bellcrank lever 42.

The bell cranklever 42, as shown in Figs. 14to 16'inclusive, consistsofade ding leg 43 provided'at itslower end wit 7 a proje'c'tion orextension 44 the outer edge of which is beveled as at 45, and anupwardly and outwardly projecting arm 46 provided lever.

with a finger 47 at its outer extremity and further having an inwardlyprojecting extension or sto lug 48 ad acent its upper outer end, sai stolu projecting through a suitable slot in t e ront plate 3 and extendingbeyond the inner face of said plate so as to be moved, at certain times,into the path of travel of the pin 49 projecting from a face near theouter circlmiierence of the gear 20. The extension 44 at the lower endof the depending arm 43 of the hell: crank lever 42 coacts with the camor star wheel 50 which is fixed to the minute hand shaft 51. This cam orstar wheel is provided with as many 09 cam surfaces as there arefractional parts of the hour to be soundedand since the presentinvention contempla es. .sound' the quarter hours, three identical 08m$11 52 and one longer cam surface 52" are pm vided and said longer oneis positioned for operation when the minute hand is at. quarter past thehour.

On the minute hand shaft 51 isalSO fixed a pinion 53 meshing with the ar54 on the stub shaft 55 and on said sha and, I'QVOlY'. ing with said earis a pinion 56 mes i with the gear 7 fast on the hollow sh or sleeve 58carrying the hour hand and other mechanism to be later described. Thehour hand is represented by the numeral 59 and the minute hand by thenumeral 60. On this hollow shaft or sleeve 58 is a snail 61 so as. torevolve with the hour, hand'and remain in constant relation thereof; Thesnail 61is provided with, twelve steps that successivieldecrease inradius and control both the 0 'me and striker hammersonlyat thedifl'erent hours while incombination, of other associated elements thechime hainmers are controlled during their movements at the fractionalparts of the hour whichis herein set forth as each quarter, hour,- andthe operation of these parts will hereinafter be more fully explained. I

The ear 54 also meshes witha inion 62 W on anot er stub shaft 63 onwhicli is nalled, for revolution with the pinion, 62, a cam wheel orsecondary snail 64 having'a number of steps, here shown as four innumber, which successively decreasein radin: apd ltihis secondarysfnalill or1 cam wheel con rost emovementso t ec lever 65,pivoted at 66.um?

Said chime timing lever includes thfi lower arm 67 withan inwardlyprojecting finger68, Ei 6, which engages the surfaces or steps of t 'esecondar snail 64, said engagement bein normal y maintained bya spring69. T is lever also includes the upper arm 70 provided with a head 71prov1 ed with a plurality of steps 72' decreasing in height or radiuswhen considered relative to the pivot point of the timing m 'Ar rangedfor coaction with the several steps 72 of the chime timing lever as wellas the different steps of the snail 61, when the head of the timinglever is in a certain position, is a pin or dog 73 carried by the freeend of the arm 74 journalled on the stub shaft 75. The in or dog 7 3 ispivoted or otherwise movab y attached to the arm 74 and is actuated by aspring 76 whereby said dog is normally held at right angles to the arm74. Should the snail be rotated while the dog is below or within. theouter circumference of said snail then said dog or pin would be forcedout of the way and the snail permitted to pass, without causing damageto the parts, after the manner of a ratchet.

Connected with the arm 74 so as to move therewith, as by a sleeve orarbor 77, Figs. 1 and 6, is a rack arm 78 carrying an arcuate rack 79 atits outer end which is normally held in a raised position by the checklever 80. Said check lever is pivoted or journalled on a stub shaft 81carried by the front plate of the frame and is substantially L-shaped soas to pass beneath or beyond certain other arts of the mechanism as willbe obvious rom the drawings, and thelower end of said check lever isrovided with a catch 82 in the form 0 an outwardly projecting integralextension and this catch prevents retrograde movement of the arcuaterack. This check lever further carries a lifting pin 83 adapted to beengaged by the outer or free end of the bell crank lever 42 when saidbell crank lever is actuated by the cam or star wheel 50 so as to raiseor oscillate the check lever 80 and disengage the catch 82 from thelower end of the arcuate rack thereby permitting the latter to descendby gravity, said descent being limited by the step or surface of thesnail or chime timing lever which happens to be in the path of travel ofthe dog or pin 73.

After the check lever has been disengaged from the arcuate rack, thecontinued move ment of the clock will cause that point of the star wheelwhich has actuated the bell crank lever to pass beyond the extension 44allowing said bell crank lever to return to its original or normalosition thereby disengaging said bell cran lever from the lifting pin 83so as to permit the check lever 80, and more particularly the catch 82,to engage the serrations of the arcuate rack and then as said rack isintermittently raised or returned to its normal position, the catch 82will progressively engage the different serrations of said arcuate rackto prevent retrograde movement thereof.

The arcuate rack is raised or lifted by the gathering pins 84 arrangedin spaced relation on a disc 85, the latter being mounted on the forwardend of the shaft 16 or on the same shaft that carries the pinion 24 onthe rear end, it being remembered that the pinion 24 meshes with themutilated gear The check lever 80 is also provided with a stop 86, Figs.6, 7 and 8, which projects through a slot 87, Fig. 2, in the front plate3 and extends beyond the inner face of said plate into the path oftravel of the pin 88 projecting from a face of the gear 20 but locatedclose to the center of said gear. \Vhen the pin 88 is in engagement withthe stop 86 all of the sound producing mechanism is normally at rest andduring the first ste of the movement to sound the chimes or striker thecheck lever 80 is raised or oscillated until the parts are in theposition shown in Fig. 7 therefore the arcuate rack has been releasedand the stop 86 on the check lever disengaged from the pin 88 on thegear 20 and in order that sufiicient time shall elapse to permit theparts to assume the positions shown in Fig. 7, the mechanism is againstopped by the pin 49 engaging the stop lug 48 on the bell crank leverwhich has been moved by the star wheel 50 so that the stop lug 48 is inthe path of travel of the other pin 49 on the gear 20.

On the plates of the clock frame is journalled a striker shaft 89, oneend of which projects beyond the rear plate and has a crank 90 connectedtherewith and to this crank is piw'oted one end of the pitman 91 theopposite end being pivoted to a crank 92, the same as the crank 90,which is attached to a suitable portion of the striker hammer 98 so asto raise said striker hammer as the shaft 89 is rotated and this strikerhammer is adapted to produce a sound upon a suitable gong, bell or othersound producing member 94 which in ordinary practice is secured to theclock case (not shown) of any desirable construction or configuration.In that portion of the striker shaft 89 located between the two platesof the frame is formed a slot 95, Fig. 10, having pivoted therein astriker fin 96 as at. 97 and the free end of said fin pro vided with acut out portion to produce the extension 98 adapted to engage the solidportion of the striker shaft beyond the end of the slot and limit thedownward movement of said fin.

\Vhen the fin is in its lowermost position, as shown in Fig. 6, thelower portion or edge thereof is adapted to be engaged by the escapementwheel 18 so as to oscillate the striker shaft 89 in one direction andthereby raise the striker hammer 93 through the medium of the cranks andpitman, said hammer and associated parts being returned to their normalpositions by gravity as soon as the pressure of the engaging tooth ofthe escapement wheel is removed from the fin, which is ordinary practiceand will be readily un derstood.

Said fin 96 is controlled by or normally held out of engagement with theesca ement wheel by a rod 99 or its equivalent, fixed to a shaft 100journalled in the plates of the clock frame and having one endprojecting beyond the rear plate. On said projecting end is mounted astriker control lever 101 provided at its outer free end with a toe 102the latter being in constant engagement with the striker control disc103, said disc being fixed to the shaft 30 so as to revolve in unisonwith the segmental gear which, as before stated, is also fixed to theshaft 30. Said striker control disc is provided with a peripheral notch104, Fig. 11, adapted to be engaged at predetermined intervals by thetoe 102 so as to permit the striker control lever 101 to drop and rotatethe shaft 100 a sufiicient distance to cause the rod 99 to be loweredand thereby permit the striker fin 96 to drop until the extension 98thereof contacts with the striker shaft 89 and the lower edge of saidfin is moved into the path of travel of the teeth of the escapementwheel.

On the shaft 30, which is the same shaftcarrying the segmental gear andthe striker control disc, is mounted the music or chime roll 105, thesame being made fast to said shaft so as to revolve therewith and thisshaft is journalled in the rear plate of the clock frame and a strip 106suitably su ported by the braces 107 or the like. T e music or chimeroll is provided with a. number of projections 108 and these arearranged to actuate the chime hammers 109 each carrying a trip 110 andsaid hammers, said chime hammers as well as the striker hammer all beingjournalled upon a shaft 111, the ends of said shaft being mounted in thestrip 106 and the rear plate of the clock frame. The chime hammers areadapted to strike suitable chime gongs or other sound producing members112 supported in the same manner as the sound producing member 94.

The clock pendulum is represented by the numeral 113, Figs. 1, 3 and 6,and this is connected to the proper part in any desirable or well knownmanner.

The operation of the device is as follows Presuming the minute hand tobe approaching the half hour then the proper cam surface 52 of the camor star wheel 50 will force the lower-arm 43 of the bell crank lever 42outward, as shown in Fig. 7. This action will raise the outer end 47 ofthe upper arm 46 of said bell crank lever so as to disengage the catch82 of the check lever 80 from beneath the arcuate rack 74 permitting thelatter to descend until the pin or dog 73 engages the intermediate step72 on the head 71 of the chime timing lever 65, it being understood thatsaid chime timing nwmae lever has been pro rl sitioned means of the camor sec dl id r snail which is timed to revolve once each hour. In'thilway the distance that time atolmte rack is lowered or dropped has beendetermined, at in other words, the rack hasheen dropped, suflicientdistance to expose four of its teeth to the action of the gatherin pins.84. At the same time the stop 86" on e chad: law 80 will be moved out ofthe path of travel of the pin 88 on the gear or warni wheel 20 and thestop in 48 on the bell crank lever 42 will be moved into the path oftravel of the pin 49 on the same gear or warning wheel 20 so that theparts will operate until the pin 49 contacts with the stop lug 48 atwhich time all the parts are at rest, as shown in Fig. 7, which willprevent me striking: rs from running until the minute hand lias exactlyreached the half hour at whichwtime the projection or extension 4.4 atthe lower end of the bell crank lever will drop of the cam surface whichhas moved the bell crank lever, onto the lowest point of the nextsucceeding cam surface as in Fi t 8.

Said bell crank lever drops b gravity and in its movement the stop in 8is removed from the path of travel of t a pin 49 of the gear or warningwheel 20 thereby permitting the striking gear train to actuate and cauaethe gathering pins to revolve and successive teeth of the rack tointermi raise the same, any retro ado movement of said rack beingprevente b on gamut of the catch 82 on the check l ver z) with theserrations of the rack, and when said rock has been raised a sufiioientdistance to permit the catch 82 to pass beneath the lower end of saidrack the stop 86 of the check lever will move into the path of travel(if the pin 88 thereby stopping any further movement of the strikermechanism.

The same action takes place on any other fraction of the hour for whichthe mechanism is designed and since the present one contemplates playingthe chimes each quarter hour this action takes place on the hour, priorto striking, as wel as the quarter, half and three quarters past thehour. At

the quarter hour the fall and subsequentlift of the arcuate rack 79 islimited b the highest step 72 on the chime timing ever, whereas on thehalf hour the intermediate step of the chime timing lever regulates themoving distance of the rack, while on the three quarter hour it iscontrolled {he lowermost step on said chime timing ever.

On the hour the highest cam surface of the cam or secondary snail 64will engage the arm 67 of the chime timing lever so as to move the head71 of said lever entirely out of the path of travel of the pin or dog 73thereby permitting the arcuate rack to descend until the pin or dog 73ongages one of the steps or surfaces on the snail 61 so that the rackwill have to be lifted a sufficient distance to permit the chimes to beplayed and the striker hammer actuated as will be presently described.

During the movements of the mechanism while the arcuate rack is beingraised motion is transmitted through the shaft 16, on which the atheringpins are mounted, and through tie pinions 24, also mounted on saidshaft, to the segmental gear 25 which is mounted on the shaft 30 therebycausing the music roll 105 which is also on said shaft, to revolve andactuate the chime members.

As the striker controlling disc 103 is fast on the same shaft 30 as thesegmental gear the notch 104 in said disc will be advanced toward thetoe 102 of the striker control lever 101 as will be obvious.

As the time mechanism continues its movements the hands of the clockwill be advanced until the minute hand approaches the three quarterposition which movement will cause another cam surface 52 of the cam orstar wheel 50 to actuate the bell crank lever as hereinbefore describedand at the same time will advance the snail 61 and the secondary snailor cam wheel 64 until the lowermost or third step 72 on the chime timinglever is in the path of travel of the pin or dog 73 so that when thearcuate rack is released it will descend until the dog or pin 73contacts with the lowermost one of the steps 72 on the chime timinglever and therefore during the return of the arcuate rack to its normalposition it will move over a greater distance and the chimes will beplayed a greater length of time.

The continued movement of the time mechanism will advance the minutehand toward the hour position and during said movement another of thecam surfaces 52 will actuate the bell crank lever and again worktheparts as before described until the head of the chime timing leverhas been moved completely out of the path of travel of the dog or pin 73and the proper hour step on the snail 61 positioned in the path oftravel of the pin or dog 73 so that when the arcuate rack is released itwill descend the distance determined by the movement of the arm 74 whichwill be necessary to permit the pin or 'dog 73 to descend onto the snailstep and when the striker mechanism begins to operate the rack will beraised'as hereinbefore described causing the chimes to be played andwhen said chimes have been struck the desired number of timesthesegmental gear 25 will have been advanced until the blank portion 26thereof has reached the pinion 24 thereby preventing further revolutionof the segmental gear :so that the shaft on which it is' mount? ed willbe stopped and the chimes will cease playing. The striker control disc103 revolving in unison with the segmental gear just as the blank spaceof the gear reaches the pinion 24 the notch 104 on the striker controldisc 103 will reach the toe 102 on the striker control lever 101 andpermit said lever to,descend. The descent of said lever will rotate theshaft 100 on which it is mounted so as to move the rod 99 downward whichwill permit the fin 96 to descend into the path of travel of the teethon the escapement wheel 13 and be actuated by said escapementwheel aslong as the shaft 16 continues to revolve or until the arcuate rack hasbeen lifted to its normal raised position and the mechanism stopped bythe engagement of the pin 88 with the stop 86 on the check lever. Theaction of the escapement wheel upon the fin 96 oscillates the shaft 89and transmits motion through the two cranks 90 and 92 and the pitman'91to the striker hammer 93 caus-' ing the latter to sound the hour uponthe gong or sound producing member 94.

As the minute hand is advanced to the quarter hour position, the camsurface 52 which is of greater length than the others on the cam or starwheel 50 will move the bell crank lever 42 a suflicient distance tocausethe arcuate foot '40 ofthe lift lever 39 to engage the pin38 of thesliding segment and raise said sliding segment until the teeth thereofmesh with the pinion 24 at which time the rest lever 34 will passbeneath the tang 33 of the sliding segment, as shown in Fig. 5, therebyholding said sliding segment in the position that completes thesegmental gear, even after the lift lever 39 is returned to the positionshown in Fig. 4, which is the position of the lift lever when the bellcrank lever 42 is on the lowest part of any one of the cam surfaces.When the minute hand reaches the quarter hour and the bell crank leverreturns to its normal position, the striking mechanism will begin itsoperations and cause the chime hammers to be actuated and since in thisposition the highest one of the steps 72 on the chime timing lever willbe in the path of travel of the dog 73 the descent of the arcuate rackwill be very short and the chimes will be played but few times duringthe return of said arcuate rack to its normal position. Should thesegment 27 remain in the position which completes the segmental ormutilated gear 25 for any reason whatever it will be forced backwardjust prior to the blank space or themutilated gear reaching the pinion24 by the pin 38 riding under the beveled surface 115 of the segmentsetting member 116.

If for any reason the hands of the clock turn back less than one quarterhour when the minute hand Was originally at the hour ition and after thesounding devices have en actuated, the star wheel 50 will engage thearcuate bevel surface 45 on the extension 44 of the bell crank lever andbecause of the a resiliency of the lower or depending arm 43 will forcesaid arm toward the front plate of the clock frame and mit the starwheel to pass the bell crank ever extension without injury to any oi theparts; This move- 10 ment does not actuate the bell crank lever andtherefore all the parts remain in the same positions as when the minutehand is at thehour' position. When the hands are in advanced and theminutehaud reaches 15 t a hour position the bell crank lever. will beactuated and the a'ncuate rack released so the sound producing mechanismwill begln the operating but asithe blank space of the tal orl'mutilatedgear is in registraac tion with the pinion 24 the chimes willpot be pla.ed and as the toe 102 oi the strlker contro clever 101 is in the notch104 of the disc 103 only the striker hamm r W 11 be actuated and as'this is then actuated 26 throughout the entire distance of that rtilo'nof1k the arcutzge rack whiflaqdeseen is,

t estr"esupon egong W1 ,a'g ea number than the l'1our- -a t whichtheflhitnds point, but when the minute hand s ad "1'3? segm i h a1 si "gento t esegmen, be moved into position; theneby the music. roll, thestriker, contro 'dit an the segmental gear in roper relation to the IQmovements of the hen so. that the meet number of chimes will he struckand as the snail 61 is inconstalit relation, to the hour. hand thestriker. hammer will. produce the cormct'number of: sounds upon thesound producing. member-at the next or succeeding ours.

Should the hands he turned back at any time"hetween'the hours, as "forinstance after the chimes have been. played. for the three arten hour,then the sequence of the sound Foducing devices. will be changed withreation to the hands, and if the mental gear has not advanced too far.on the proper number ofi chimes will be played becauseof the relationof. the. chime timin' 1ever65fto the pin or dog- 73', but if thesegmental gear has advanced so far that the notch in the striker controldisc has aegisteredwith the toe of the strike]: control lever their thestrilmr hammer will be actu Med and the number of strikes made therebywill'be too man'v for-the hour to which the hands point. i

When the parts are not in synchronise and have been advanced so that thenotch in the striker control disc 103 re 'sters with the toe 102 of thestriker contr Tever- 101 the music roll will have been advanced: in thesame relation and the segmental 'gear )5 will alsc'have' been traceduntil itsblank to the quarter h ur position. h

g may be revolired, a sliding se Lew-,1

space has registered with the pinion 24. which revents further movementof the mental gear and its co-related parts ant F the minute handreaches the quarter hon! position at which time the se entalgear--76will be completed as before escrihed and the parts will again beactuated in chronism. Of course I do not wish to, be limited on theexact details of construction as Mme": shown as these may be variedwithini'tho limits of the pended claims without parting from s s irit ofmy invention Having thus fu y described m inyesi I tion, what I claim asnew and usefu 1. In a device ofthe character stated, the combination ofchime hammers, a music for actuating said chime hammers, astriker'hammer, means for-placing said striker ham mer in and out of operativetion, a notched disc revolving with the music rhll for controlling saidmeans, a mm gear revolvin in unison with thenotcheddisc and music roll,means for transmitting mg tion to said segmental gear, a time mocha nismand a mechanism controlled by the time mechanism for starting thesegmental gear at predetermined intervals for syn chronizi the differenthammers with the time mec anism. T

2. Ina device of the character stated, th e combination of a timemechanism, a striker mechanism including an escapement wheel] and awarning gear, chime hammers, a music roll for actuating said chimehammers, a striker hammer, a pivoted fin ada to co operate with theescapement wheel for actji} atin the striker hammer, a shaft, means carred by said shaft and coacting with the pivoted fin for causing said finto move and out of engagement with the esca t wheel, a striker controllever carried y said shaft, a disc having a notch therein adapt ed torevolve in unison withthe music roll and coactin with: thestriker'control lever for controll g the strikerhammer, a sag mentalgear, a pinion receiving its motion from the striker mechanism andcoacti with the segmentalgearwhereby the by said gear whereby it may comfor starting the same, msanapont'nol by the time'mecliani sm for movingthe said segment into; rati-ve position, and means for holdingsaisegment in said position un til the segmentalgear has started revolving.

3. In a device of the character stated, the" combination of chime'ham'ine'rs, aimusi rll" for actuating said chime' hammers, a strikerhamme'r, means for ac'tuat' hammer, a'sliaft, means catci 'b v saidshalt for controlling the first flamed time 'a' striker control levercarried' by said she a striker control with which" the control levercoacts'to prevent the striker "hammer:

ant carried the striker from operating, said disc having a notch thereinwhereby the striker hammer may be placed in operative condition, asegmental gear through which motion is transmitted to the control discand music roll, said gear having a blank space, a segment having teethfor completing the gear, a lift lever for moving the segment intooperative position, means for actuating said lift lever at a predetermined time and means for temporarily holding the segment inoperative position.

4. In a device of the character described, a striker shaft having a slottherein, a fin pivoted within said slot, an escapement wheel coactingwith said fin to oscillate the striker shaft and means for holding saidfin away from the escapement wheel.

5. In a device of the character stated, a striker shaft, an escapementwheel adjacent thereof, a fin pivoted to the shaft and adapt ed to beengaged by the escapement wheel for oscillating the striker shaft, andmeans for holding said fin out of engagement with the escapement wheeluntil a predetermined time.

6. In a device of the character stated, a striker shaft having a slottherein, a fin pivoted to the shaft within said slot, an extensionprojecting'from the free end of said fin and adapted to engage the shaftadjacent one end of the slot to limit the movement of said fin in onedirection, an escapement wheel for engaging the fin to oscillate thestriker shaft, and means for holding the fin out of engagement with theescapement wheel.

7. In a device of the character stated, a striker shaft having a slottherein, a tin pivoted to the shaft within said slot, an extensionprojecting from the free end of said fin and adapted to engage the shaftadjacent one end of the slot to limit the movement of said fin in onedirection, an escapement wheel for engaging the fin to oscillate thestriker shaft, a shaft, a rod fixed to said shaft and coacting with thefin to move and hold said fin out of engagement with the escapementwheel, a striker control lever having a toe at the free end thereof anda revolving striker control disc on which the toe of the striker controllever rests, whereby the fin will be held out of engagement with theescapement wheel, said disc having a notch therein into which the toe ofsaid lever drops for placing the fin in operative position.

8. In a device of the character stated, a gear having a blank space, asegment having teeth for completing the gear, and means associated withthe minute hand of a clock for actuating said segment.

9. In a device of the character described, a gear having a blank space,a sliding segment having teeth for completing the gear,

said segment carried by the gear, means for moving the segment intooperative position, and means for temporarily holding said segment inoperative position.

10. In a device of the character described, a gear having a blank space,a sliding segment having teeth for completing the gear, said segmentcarried by the gear, a lift lever for moving the segment into operativeposition, a shaft to which. said lever is fixed, another lever fixed tosaid shaft, means for actuating the last named lever to cause the liftlever to operate the segment and means for temporarily holding saidsegment in operative position.

11. In a device of the character stated, a gear having a blank space, asegment having teeth for completing the gear, a tang projecting from thesegment, means for moving said segment into operative position tocomplete the gear and a pivoted rest member coacting with the tang totemporarily hold the segment in operative position.

12. In a clock mechanism the combination of a snail, a pivoted rackgoverned by said snail, a sound producing mechanism, means carried bysaid mechanism and cooperating with the pivoted rack for intermittentlyactuating said rack at predetermined intervals, a sound producing deviceconnected with the sound producing mechanism and adapted to be actuatedduring the intermittent movement of the pivoted rack.

13. In a clock mechanism, a segmental gear, a pinion cooperating withsaid segmental gear, a sound producing mechanism by which motion istransmitted to the pinion, certain sound producing devices, meansreceiving its motion from the segmental gear for actuating said soundproducing devices, a pivoted arcuate rack, means actuated by the soundproducing mechanism for moving said rack intermittently in onedirection, means for preventing retrograde movement of the rack, a snailfor limiting the movement of the rack in an opposite direction and meansfor releasing the rack and, the means which intermittently moved saidrack.

1%. In a clock mechanism, the combination of a snail associated with thehour hands of the clock and having twelve steps, a cam wheel orsecondary snail, means for transmitting motion to said cam wheel wherebythe latter will make one complete revolution each hour, a chime timinglever having three steps and actuated by the cam wheel, a pivotedarcuate rack having a pin associated therewith for coaction with thesteps of the chime timing lever during fractional parts of an hour andthe steps of the snail on the different hours at which time the chimetiming lever will have been moved out of the path of travel of the pinfor determining the distance of descent of said rack, sound producingdevioeg, means for actuating the sound producing devices and lifting therack and means associated with said'rack and said means to actuate thesound producing devices for preventing

